JP7438618B2 - Synthetic resin container and method for manufacturing container assembly - Google Patents

Description

The present disclosure provides a synthetic resin container including a cylindrical mouth, a body forming a storage space for contents, and a bottom closing the lower end of the body, and a synthetic resin container equipped with a cap. The present invention relates to a method of manufacturing a container assembly.

Examples of synthetic resin containers that can contain contents such as cosmetics and drinks include synthetic resin containers that have a cylindrical opening and a body that forms a space for accommodating the contents, as shown in Patent Document 1, for example. container is known. In this type of synthetic resin containers, efforts have been made to reduce the amount of resin by thinning the body and bottom in order to consider environmental issues and reduce costs, as shown in Patent Document 2, for example. There is.

Japanese Patent Application Publication No. 2002-211607 Japanese Patent Application Publication No. 2003-104343

Incidentally, in the above-mentioned synthetic resin containers, the mouth portion is generally formed to have the largest thickness from the viewpoint of ensuring airtightness when the cap is attached. Therefore, conventional synthetic resin containers still have room for improvement in terms of further weight reduction of the mouth portion.

The present disclosure aims to solve these problems, and its purpose is to provide a synthetic resin container whose mouth can be made lightweight, and a container assembly in which a synthetic resin container is fitted with a cap. The aim is to propose a method for manufacturing three-dimensional objects.

The synthetic resin container of the present disclosure includes:
The container is made of synthetic resin and includes a cylindrical mouth for dispensing the contents, a body extending below the mouth to form a storage space for the contents, and a bottom for closing the lower end of the body. hand,
The mouth portion has a threaded engagement portion formed on an outer peripheral wall of the mouth portion,
The bottom portion includes a bottom wall that defines the lower end of the storage space, and a rib that hangs downward from the bottom wall, and a side surface of the rib is provided with a recess that is recessed in a substantially horizontal direction or a protrusion that projects in a substantially horizontal direction. is provided,
The rib extends radially outward on a straight line passing through the central axis when viewed from the bottom,
The recess or convex part is composed of a plurality of concave parts or a plurality of convex parts, and one of the plurality of concave parts or the plurality of convex parts surrounds the other one concave part or convex part around the central axis line. It is located at a position rotated 180 degrees,
The ribs are characterized in that the ribs hang down from the bottom wall to the same height when the synthetic resin container is in an upright position .

Further, in the synthetic resin container of the present disclosure, in the above configuration, the bottom further includes a leg extending downward from the lower end of the body, and the lower end of the leg is connected to the lower end of the rib. It is preferable that it extends further downward.

Further, in the synthetic resin container of the present disclosure, in the above configuration, the bottom portion returns from the lower end portion of the leg portion to the lower end portion of the body portion along the leg portion, and further includes a folded portion continuing to the bottom wall. It is preferable to have one.

Further, the container assembly of the present disclosure includes:
A method for manufacturing a container assembly in which a cap is attached to the mouth of a synthetic resin container,
The synthetic resin container is
The cylindrical mouth part for pouring out the contents, the body part extending below the mouth part and forming a storage space for the contents, and the bottom part closing the lower end of the body part,
The mouth portion has a threaded engagement portion formed on an outer peripheral wall of the mouth portion,
The bottom portion includes a bottom wall that defines the lower end of the storage space, and a rib that hangs downward from the bottom wall, and a side surface of the rib is provided with a recess that is recessed in a substantially horizontal direction or a protrusion that projects in a substantially horizontal direction. is provided,
The rib extends radially outward on a straight line passing through the central axis when viewed from the bottom,
The recess or convex part is composed of a plurality of concave parts or a plurality of convex parts, and one of the plurality of concave parts or the plurality of convex parts surrounds the other one concave part or convex part around the central axis line. It is located at a position rotated 180 degrees,
a step of bringing an abutment part of a rotation suppression jig into contact with a side surface of the rib;
rotating a cap that fits the threaded engagement part in a circumferential direction and attaching it to the mouth part;
The ribs are characterized in that the ribs hang down from the bottom wall to the same height when the synthetic resin container is in an upright position .

According to the present disclosure, it is possible to propose a synthetic resin container whose mouth can be made lightweight, and a method for manufacturing a container assembly in which a synthetic resin container is fitted with a cap.

FIG. 1 is a front partial cross-sectional view of a synthetic resin container according to an embodiment of the present disclosure. 2 is an enlarged cross-sectional view taken along the line AA in FIG. 1. FIG. FIG. 2 is a bottom view of a synthetic resin container according to an embodiment of the present disclosure. FIG. 2 is a partial cross-sectional view of the right side of a synthetic resin container according to an embodiment of the present disclosure. FIG. 1 is a front view of a synthetic resin container (immediately after blow molding) according to an embodiment of the present disclosure. FIG. 2 is a right side view of a synthetic resin container (immediately after blow molding) according to an embodiment of the present disclosure. 1 is a flowchart illustrating an implementation procedure of a method for manufacturing a container assembly according to an embodiment of the present disclosure. FIG. 2 is a front partial cross-sectional view showing a state in which a synthetic resin container according to an embodiment of the present disclosure is mounted on a rotation suppressing jig and a cap is attached. FIG. 2 is an enlarged right side cross-sectional view showing a state in which a synthetic resin container according to an embodiment of the present disclosure is attached to a rotation suppression jig and a cap is attached. 9 is a sectional view taken along line BB in FIG. 8. FIG. 9 is a sectional view taken along line CC in FIG. 8. FIG. FIG. 9 is a diagram showing a state in which a downward load is applied to the mouth portion when the cap is attached in FIG. 8;

Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

FIG. 1 shows a synthetic resin container 100 that is an embodiment of the present disclosure. The synthetic resin container 100 includes a spout 10 for dispensing contents such as cosmetics and food, a body 20 extending below the mouth 10 and forming a storage space S for the contents, and a lower end of the body 20. It has a bottom part 30 that closes the bottom part 30. In this specification, claims, abstract, and drawings, the side where the mouth portion 10 is located is referred to as the upper side (the upper side in FIG. 1), and the side where the bottom portion 30 is located is referred to as the lower side (the lower side in FIG. 1). do. Further, the radially outer side is the direction outward along a straight line passing through the central axis O of the synthetic resin container 100 in FIG. It means the direction toward the central axis O. Further, the direction perpendicular to the plane of the paper in FIG. 1 is the front-back direction of the synthetic resin container 100, and the left-right direction in FIG. 1 is the left-right direction of the synthetic resin container 100. Further, the outer circumferential wall 11 of the mouth portion 10 refers to a cylindrical portion in which a male threaded portion 11a, which is an engaging portion, is formed.

In this embodiment, the synthetic resin container 100 can be formed, for example, by extrusion blow molding a parison made of a synthetic resin material. Moreover, the synthetic resin container 100 can also be formed by performing biaxial stretch blow molding on a preform formed by injection molding, compression molding, extrusion molding, or the like. Here, as the material of the preform, a synthetic resin material that exhibits stretchability when heated, such as low density polyethylene (LDPE), high density polyethylene resin (HDPE), polypropylene (PP), and polyethylene terephthalate (PET), is used. be able to.

In this embodiment, the mouth portion 10 of the synthetic resin container 100 is a cylindrical body having a substantially circular shape in plan view. The male threaded portion 11a provided in the mouth portion 10 is an engagement portion for attaching the cap 41 (see FIG. 8) or a dispensing tool with the cap 41 to the mouth portion 10 by threaded engagement. It is integrally formed with the outer peripheral wall 11 of. In addition, both the male thread part 11a and the engagement protrusion for plugging engagement may be provided as the engagement part, and the two may be selectively used depending on the object to be worn.

In this embodiment, the mouth portion 10 is not provided with any other functional portion such as a neck ring, except for the external threaded portion 11a, which is a threaded engagement portion, provided on the outer surface of the outer circumferential wall 11. This is to reduce the amount of resin used for the mouth part 10 by simplifying the structure of the mouth part 10 as much as possible to suppress the height of the mouth part 10 and making it thinner.

A body section 20 is provided below the mouth section 10 and has a substantially cylindrical shape and is connected to the lower end of the mouth section 10 via a shoulder section. The inside of the body 20 forms a storage space S for the contents, and by pressing (squeezing) the body 20, the contents in the storage space S can be pressurized and then poured out.

A lower end portion of the body portion 20 is closed by a bottom portion 30. In the present embodiment, the bottom portion 30 includes a bottom wall 31 that defines the lower end of the content storage space S, a rib 35 that hangs downward from the bottom wall 31, and legs that extend downward from the lower end of the body portion 20. portion 32 and a folded portion 33 that returns from the lower end portion 34 of the leg portion 32 to the lower end portion of the body portion 20 along the leg portion 32 and continues to the bottom wall 31.

In this embodiment, the bottom wall 31 is configured as an inclined surface that slopes downward toward the inside in the radial direction, and a central recessed portion 31a that is recessed downward and has a flat bottom surface is provided in the radial center portion. . With such a configuration, even when the remaining amount of contents in the storage space S becomes small, the contents stored in the central recess 31a can be sucked up and used by the pump 42 via a pipe 43, which will be described later. .

As shown in FIGS. 1 to 4, the rib 35 is a plate-shaped portion that hangs downward from the bottom wall 31 and extends radially outward (in the left-right direction in FIG. 1) through the central axis O when viewed from the bottom. It is. The ribs 35 are rounded at the lower corners of the left and right ends (see FIG. 1). Additionally, the lower corners of the front and rear ends are also chamfered (see FIG. 2, etc.). This can suppress the occurrence of scratches and the like when the user directly touches the ribs 35 or when the ribs 35 hit other objects.

As shown in FIGS. 2 and 3, a recess 36a that is horizontally recessed from the front toward the rear is formed on a side surface 35a (front side) extending left and right of the rib 35. Furthermore, a recess 36a that is recessed horizontally from the rear toward the front is formed on the opposing side surface 35a (rear side). As can be seen from FIGS. 1 and 3, the pair of recesses 36a face each other with respect to the central axis O, and are arranged at approximately the same distance from the central axis O. Furthermore, one recess 36a is rotated 180 degrees around the central axis O so that it overlaps with the other recess 36a (see FIGS. 1 to 3). That is, the pair of recesses 36a are in a point-symmetrical positional relationship with respect to the central axis O when viewed from the bottom. Each recess 36a is tapered so that the width and height become slightly narrower in the vertical and horizontal directions toward the back.

The rib 35 having such a configuration can be formed at a pinch-off portion that is partially cut off by the blow molding die when the synthetic resin container 100 is formed by extrusion blow molding, for example.

As shown in FIG. 1, the bottom portion 30 is provided with leg portions 32 that slope downward and radially outward from the lower end of the body portion 20. Further, a folded portion 33 that returns along the leg portion 32 to the lower end portion of the body portion 20 is continuous to the lower end portion 34 of the leg portion 32 . The upper end of the folded portion 33 is continuous with the outer peripheral end of the bottom wall 31. That is, the body portion 20, the leg portions 32, the folded portions 33, and the bottom wall 31 are formed of continuous thin members.

In this embodiment, the lower end portion 34 of the leg portion 32 extends below the lower end portion of the rib 35. With this configuration, when the synthetic resin container 100 is placed on a desk or the like in an upright position, the lower ends 34 of the legs 32 come into contact with the installation surface, and the ribs 35 do not touch the installation surface. Therefore, the synthetic resin container 100 can be stably installed.

Moreover, by configuring the leg portions 32 to be inclined downwardly and radially outward from the lower end portion of the body portion 20, the upright posture of the synthetic resin container 100 can be further stabilized.

Here, a method for forming the above-mentioned leg portions 32 and folded portions 33 will be explained.

5 and 6 are a front view and a right side view of the synthetic resin container 100 immediately after being formed by extrusion blow molding or the like. Here, the explanation will focus on the configuration near the folded portion 33, which has a different shape from those in FIGS. 1 and 4.

As shown in FIGS. 5 and 6, the bottom portion 30 is provided with leg portions 32 that slope downward and radially outward from the lower end of the body portion 20. Further, a folded portion 33 that extends downward from the lower end portion 34 of the leg portion 32 and slopes inward in the radial direction is provided continuously to the leg portion 32 . A small diameter bending part 33a having an upwardly convex shape is provided at the lower end of the folded part 33, and the bottom wall 31 is connected to the bottom wall 31 via the bending part 33a.

When the folded part 33 is pushed upward for the synthetic resin container 100 having the configuration shown in FIGS. Directed inward and upward. At this time, the bent portion 33a is bent significantly so as to protrude upward, so that the bottom wall 31 moves upward while maintaining almost the same shape and posture, and the bottom wall 31 is moved upward to form the raised bottom shown in FIGS. 1 and 4. 30 is formed.

Next, a procedure for manufacturing the container assembly 101 by attaching the cap 41 to the opening 10 of the synthetic resin container 100 shown in FIGS. 1 to 4 will be explained using FIGS. 7 to 12.

When manufacturing the container assembly 101, first, the synthetic resin container 100 provided with the ribs 35 and the recesses 36a shown in FIGS. 1 to 4 (step S101 in FIG. 7).

Next, the synthetic resin container 100 manufactured in step S101 is set in the rotation suppression jig 50, as shown in FIGS. 8 to 11. When setting the rotation suppressing jig 50, first place the synthetic resin container 100 so that the lower end 34 of the leg 32 of the synthetic resin container 100 is in contact with the upper surface of the jig base 53. Next, the two abutting portions 51 erected from the jig base 53 of the rotation suppressing jig 50 are arranged so as to abut the side surfaces 35a (see FIGS. 10 and 11) of the ribs 35 of the synthetic resin container 100, respectively. At this time, the protruding part 52 that protrudes horizontally from the abutting part 51 is inserted into the recess 36a of the rib 35 (see FIG. 10) (step S102 in FIG. 7). As a result, when the synthetic resin container 100 is set in the rotation suppressing jig 50 and the cap 41 is attached to the mouth part 10 by screw engagement, as will be described later, the rotational torque applied to the mouth part 10 causes the center By pushing back the side surface 35a of the rib 35 that is about to rotate around the axis O, the abutting portion 51 can prevent the synthetic resin container 100 from rotating.

In this embodiment, in order to prevent any force other than the torque that suppresses rotation from acting on the synthetic resin container 100, the pair of abutting portions 51 and the protruding portions 52 are arranged as shown in FIGS. 8 and 11. As seen from the bottom, they are configured to have a point-symmetrical positional relationship with respect to the central axis O.

In step S102, after setting the synthetic resin container 100 in the rotation suppression jig 50, the operator or the setting machine places the cap 41 with the female threaded portion that fits the male threaded portion 11a on the center axis O, as shown in FIG. It is attached to the mouth part 10 by rotating it around (step S103 in FIG. 7). In this embodiment, as shown in FIG. 8, the cap 41 includes a pump 42 that sucks and pressure-feeds the contents contained in the storage space S of the synthetic resin container 100, and a pipe 43 that guides the contents to the pump 42. It is a part of a pump assembly 40 that includes a pump head 44 that operates the pump 42 by pressure, and a nozzle 45 that spouts out the pumped contents.

In this embodiment, as shown in FIG. 8, the lower end of the pipe 43 that guides the contents in the storage space S to the pump 42 is configured to extend to the vicinity of the central recess 31a in the bottom 30. Therefore, even if a downward load other than rotational torque is applied to the opening 10 when the cap 41 is attached to the opening 10, the lower end of the pipe 43 will not come into contact with the bottom 30, as shown in FIG. This suppresses further downward displacement of the mouth portion 10. Therefore, even if the cap 41 is attached without supporting the mouth portion 10 with a neck ring or the like, damage such as buckling of the synthetic resin container 100 can be suppressed.

In this embodiment, the bottom portion 30 of the synthetic resin container 100 includes a rib 35 and a recess 36a, and the abutment portion 51 of the rotation suppressing jig 50 is brought into contact with the side surface 35a of the rib 35, and the recess 36a provided in the rib 35 Although the protruding portion 52 protruding from the abutment portion 51 is inserted into the abutting portion 51, the present invention is not limited to this embodiment. For example, in addition to the ribs 35, the bottom 30 of the synthetic resin container 100 includes a convex portion that protrudes from the side surface 35a of the rib 35 in a substantially horizontal direction, and the convex portion is provided in the abutment portion 51, which is recessed in the horizontal direction. It may be configured to be inserted into the section.

Moreover, the synthetic resin container 100 used for manufacturing the container assembly 101 may have a configuration in which the bottom portion 30 is provided with the ribs 35 but not provided with the recessed portion 36a. In this case, it is preferable that the abutment part 51 of the rotation suppression jig 50 does not include the protrusion part 52.

As described above, the synthetic resin container 100 according to the present embodiment includes a cylindrical opening 10 from which the contents are poured out, and a body section that extends below the opening 10 and forms a storage space S for the contents. 20 and a bottom part 30 that closes the lower end of the body part 20, the mouth part 10 has a threaded engagement part (external thread part 11a) formed on the outer peripheral wall 11 of the mouth part 10. The bottom portion 30 includes a bottom wall 31 that defines the lower end of the accommodation space S, and a rib 35 that hangs downward from the bottom wall 31, and a side surface 35a of the rib 35 is provided with a recess 36a that is recessed in a substantially horizontal direction. It was configured so that By employing such a configuration, when attaching the cap 41 to the synthetic resin container 100, the rib 35 of the bottom portion 30 is used to support the synthetic resin container 100 instead of supporting the neck ring of the mouth portion 10 in the past. The cap 41 can be attached while being fixed in the circumferential direction. That is, the cap 41 is rotated in the circumferential direction while the rotation around the central axis O of the synthetic resin container 100 is suppressed by abutting the abutting portion 51 of the rotation suppressing jig 50 against the side surface 35a of the rib 35. Since the cap 41 can be attached to the mouth part 10, a neck ring or the like for fixing the mouth part 10 is not necessary. Therefore, by reducing the height of the mouth 10, the amount of resin used for the mouth 10 can be reduced. On the other hand, since the ribs 35 provided on the bottom part 30 have conventionally been formed as pinch-off parts that are partially cut off by a mold during extrusion blow molding, new resin is required to form the ribs 35. The amount is less than the amount of resin reduction at the mouth 10. Therefore, the amount of resin used for the entire synthetic resin container 100 can also be reduced.

Moreover, in the above-mentioned form, when the abutment part 51 of the rotation suppression jig 50 is brought into contact with the side surface 35a of the rib 35, the protrusion that protrudes from the abutment part 51 into the recess 36a provided in the side surface 35a of the rib 35 52 can be inserted. Therefore, when attaching the cap 41 to the mouth portion 10, it is possible to prevent the rib 35 from slipping off the rotation suppressing jig 50 due to the torque for suppressing the rotation of the synthetic resin container 100.

Further, in this embodiment, the rib 35 extends radially outward on a straight line passing through the central axis O when viewed from the bottom, and the recess 36a is composed of a plurality of recesses 36a, one of the plurality of recesses 36a. Each of the two recesses 36a is arranged at a position where the other recess 36a is rotated by 180 degrees around the central axis O. By employing such a configuration, it is possible to suppress a force other than the torque that suppresses rotation from acting on the synthetic resin container 100 from the rotation suppressing jig 50.

Furthermore, in the present embodiment, the bottom portion 30 further includes a leg portion 32 extending downward from the lower end portion of the body portion 20, and the lower end portion 34 of the leg portion 32 extends below the lower end portion of the rib 35. It was configured to do so. By employing such a configuration, when the synthetic resin container 100 is placed on a desk or the like in an upright position, the lower ends 34 of the legs 32 will come into contact with the installation surface, and the ribs 35 will not touch the installation surface. do not have. Therefore, the synthetic resin container 100 can be stably installed.

Further, in this embodiment, the bottom portion 30 is configured to further include a folded portion 33 that returns from the lower end portion 34 of the leg portion 32 to the lower end portion of the body portion 20 along the leg portion 32 and continues to the bottom wall 31. By employing such a configuration, the folded portion 33 is formed by conventional blow molding and is inverted to form the leg portion 32 extending further downward from the bottom wall 31 as a raised bottom shape. Therefore, the formation of the leg portions 32 can be facilitated. Further, since the leg portion 32 and the folded portion 33 have a double structure, the base of the synthetic resin container 100 can be made strong, and the synthetic resin container 100 can be stably installed.

Further, the container assembly 101 according to the present embodiment is a method for manufacturing a container assembly 101 in which a cap 41 is attached to the mouth portion 10 of a synthetic resin container 100, and the synthetic resin container 100 is used for pouring the contents. The mouth part 10 includes a cylindrical mouth part 10 for dispensing contents, a body part 20 that extends below the mouth part 10 and forms a storage space S for contents, and a bottom part 30 that closes the lower end of the body part 20. The bottom part 30 has a threaded engagement part (external thread part 11a) formed on the outer circumferential wall 11 of the mouth part 10, and the bottom part 30 includes a bottom wall 31 that defines the lower end of the accommodation space S, and a rib 35 that hangs downward from the bottom wall 31. a step of abutting the abutting portion 51 of the rotation suppressing jig 50 against the side surface 35a of the rib 35; and a step of rotating the cap 41 that fits the screw engagement portion in the circumferential direction and attaching it to the mouth portion 10. It was configured to include. By employing such a configuration, when attaching the cap 41 to the synthetic resin container 100, the rib 35 of the bottom portion 30 is used to support the synthetic resin container 100 instead of supporting the neck ring of the mouth portion 10 in the past. The cap 41 can be attached while being fixed in the circumferential direction. That is, the cap 41 is rotated in the circumferential direction while the rotation around the central axis O of the synthetic resin container 100 is suppressed by abutting the abutting portion 51 of the rotation suppressing jig 50 against the side surface 35a of the rib 35. Since the cap 41 can be attached to the mouth part 10, a neck ring or the like for fixing the mouth part 10 is not necessary. Therefore, by reducing the height of the mouth 10, the amount of resin used for the mouth 10 can be reduced. On the other hand, since the ribs 35 provided on the bottom part 30 have conventionally been formed as pinch-off parts where a part is cut off by a mold during extrusion blow molding, additional resin is required to form the ribs 35. The amount is less than the amount of resin reduction in the mouth 10. Therefore, the amount of resin used for the entire synthetic resin container 100 can also be reduced.

Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various changes and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included within the scope of the present invention. For example, functions included in each component can be rearranged so as not to be logically contradictory, and a plurality of components can be combined into one or divided. It is to be understood that these are also included within the scope of the present invention.

For example, in the present embodiment, the rib 35 extends radially outward on a straight line passing through the central axis O when viewed from the bottom, and the recess 36a is composed of two recesses 36a, one of the two recesses 36a. Although the recess 36a is arranged at a position rotated 180 degrees around the central axis O from the other recess 36a, the present invention is not limited to this embodiment. The ribs 35 do not necessarily have to be arranged on a straight line passing through the central axis O when viewed from the bottom. Further, the recessed portion 36a does not necessarily have to be located in a point-symmetrical position with respect to the central axis O when viewed from the bottom. In the synthetic resin container 100 of this embodiment, the recess 36a may be provided at at least one location. Moreover, when carrying out the manufacturing method of the container assembly 101 of this embodiment, the recessed part 36a does not necessarily need to be provided.

Furthermore, in the present embodiment, the bottom portion 30 further includes a leg portion 32 extending downward from the lower end portion of the body portion 20, and the lower end portion 34 of the leg portion 32 extends below the lower end portion of the rib 35. However, the present invention is not limited to this embodiment, and the leg portions 32 may not necessarily be provided. Although it is preferable that the synthetic resin container 100 can stand on its own and take an erect posture, it may be configured such that it cannot stand on its own and take an erect posture.

Further, in the present embodiment, the bottom portion 30 is configured to further include a folded portion 33 that returns from the lower end portion 34 of the leg portion 32 to the lower end portion of the body portion 20 along the leg portion 32 and continues to the bottom wall 31. , but is not limited to this aspect. For example, the leg portion 32 may be configured as a separate component from the body portion 20.

Further, in this embodiment, the cap 41 and the pump 42 are configured as separate parts, and the synthetic resin container 100 is attached to the assembled state of these components, but the present invention is not limited to this embodiment. A structure in which the cap 41, the pump 42, etc. are integrally formed may be used. It should be understood that the cap 41 of this embodiment includes any attachment that can be attached to the mouth 10 of the synthetic resin container 100 by screw engagement.

According to the present disclosure, it is possible to propose a synthetic resin container 100 in which the mouth portion 10 can be made lighter.

10 mouth part 11 outer peripheral wall 11a male screw part 20 body part 30 bottom part 31 bottom wall 31a central recessed part 32 leg part 33 folded part 33a bent part 34 lower end part 35 rib 35a side surface 36a recessed part 40 pump assembly 41 cap 42 pump 43 pipe 44 pump Head 45 Nozzle 50 Rotation suppression jig 51 Abutment portion 52 Projection portion 53 Jig base 100 Synthetic resin container 101 Container assembly O Central axis S Accommodation space

Claims (4)

The container is made of synthetic resin and includes a cylindrical mouth for dispensing the contents, a body extending below the mouth to form a storage space for the contents, and a bottom for closing the lower end of the body. hand,
The mouth portion has a threaded engagement portion formed on an outer peripheral wall of the mouth portion,
The bottom portion includes a bottom wall that defines the lower end of the storage space, and a rib that hangs downward from the bottom wall, and a side surface of the rib is provided with a recess that is recessed in a substantially horizontal direction or a protrusion that projects in a substantially horizontal direction. is provided,
The rib extends radially outward on a straight line passing through the central axis when viewed from the bottom,
The recess or convex part is composed of a plurality of concave parts or a plurality of convex parts, and one of the plurality of concave parts or the plurality of convex parts surrounds the other one concave part or convex part around the central axis line. It is located at a position rotated 180 degrees,
A synthetic resin container, wherein the ribs hang down from the bottom wall to the same height when the synthetic resin container is in an upright position. The bottom part further includes a leg part extending downward from the lower end part of the body part, and the lower end part of the leg part extends below the lower end part of the rib. A container made of synthetic resin. 3. The synthetic resin container according to claim 2 , wherein the bottom further includes a folded portion that returns from the lower end of the leg to the lower end of the body along the leg and continues to the bottom wall. A method for manufacturing a container assembly in which a cap is attached to the mouth of a synthetic resin container,
The synthetic resin container is
The cylindrical mouth part for pouring out the contents, the body part extending below the mouth part and forming a storage space for the contents, and the bottom part closing the lower end of the body part,
The mouth portion has a threaded engagement portion formed on an outer peripheral wall of the mouth portion,
The bottom portion includes a bottom wall that defines the lower end of the housing space, and a rib that hangs downward from the bottom wall, and a side surface of the rib is provided with a recess that is recessed in a substantially horizontal direction or a convex portion that projects in a substantially horizontal direction. is provided,
The rib extends radially outward on a straight line passing through the central axis when viewed from the bottom,
The recess or convex part is composed of a plurality of concave parts or a plurality of convex parts, and one of the plurality of concave parts or the plurality of convex parts surrounds the other one concave part or convex part around the central axis line. It is located at a position rotated 180 degrees,
a step of bringing an abutment part of a rotation suppression jig into contact with a side surface of the rib;
rotating a cap that fits the threaded engagement part in a circumferential direction and attaching it to the mouth part;
The method for manufacturing a container assembly, wherein the ribs hang down from the bottom wall to the same height when the synthetic resin container is in an upright position .

Images